A research poll several years ago from a random sample of adults asked the quest

Question

A research poll several years ago from a random sample of adults asked the questions "Did you use the Internet yesterday?" and "Are you Race A, B, or C? Is the response to the question about the Internet independent of race, given the accompanying data? Complete parts a) through e) below. a) Under the null hypothesis, what are the expected values? What is the null hypothesis? A. H_0: Race and Internet use are not independent. B. H_0: Race and Internet use are not homogeneous. C. H_0: Race and Internet use arc homogeneous. D. H_0: Race and Internet use are independent Calculate the expected values.

Explanation / Answer

Formula for expected Value:

Ei = (Row Total x Column Total) / Grand Total

Table including totals will be:

So,

For example:

E1 = (3393 x 3295) / 4454 = 2510.09

By this way, we can find all the expected frequencies. The expected frequency table will be:

Yes No Total Race A 2546 847 3393 Race B 323 145 468 Race C 426 167 593 Total 3295 1159 4454

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